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The nesosilicates (single-linked silicates) or orthosilicates, are minerals in which the (SiO4) tetrahedra are isolated and share no oxygen ions. Instead, the remaining charge on each oxygen ion is satisfied by metal ions between the tetrahedra. The tetrahedra, or (SiO4)4- groups, thus act as complex negative ions. The metal ions can bond to six or eight such tetrahedra and hold the complex structure together. More rarely five coordinated metal ion structures are also found. olivine and garnets belong to the Neosilicates. The general formulae for these minerals end with (SiO4) or a multiple of (SiO4).

 

 
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